We can estimate that Bitcoin would reach $200,000 between late 2026 and the first quarter of 2027 based on its historical growth trajectory.
The real market is not a problem from a children's math book. 
For the accuracy of your calculations, there are many unknown variables from the surrounding world that are not included.Obviously, it doesn't work this way, and there are many factors that influence the price, but it's interesting, at least for me, to look at it from a mathematical perspective.
Naturally, this doesn't work, because the cryptocurrency market is a chaos of unknown variables that are purely mathematically impossible to estimate. The final price of bitcoin will be affected by events ranging from geopolitical, economic, and ending with social. For example, how do you mathematically measure such a value as an investor's faith in the future growth / fall of bitcoin? But this is an extremely important parameter that can cross out all your mathematical calculations.